I have a promariner I'm happy with. I like the concept that any unneeded amps are shuttled to the battery that needs more. They also build the BPS chargers just in a different case. Have 2 friends that have the NocoGenius chargers (2 each ) and they are really happy with them. They are small and light.
Lot of people are going to recommend the MinKota chargers but of all the forums I visit 80% of the complaints I see about chargers loosing a bank or totally dying are about MinKota.
If you can afford it and weight and space is not a issue, the DualPro pro series is the way to go. They are great chargers and totally rebuild able.
Proud Member of Team Geezer
Charlie Weaver USN/ENC 1965-1979